Pulley-wheel



J. WALKER,` PULLBY WHEEL.

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UNITED STATES ATENT CEEICE.

JOHN-WALKER, OE CLEVELAND, OHIO.

.,PULLEY-WHEEL.

SPEGIFICATON forming partof Letters Patent No. 288,386, dated November 13,- 1883.

` Application filed April 17,1883. [No model.)

o all w/Lom t may con/cera,` Beit known that I, JOHN WALKER, `of the city of Cleveland, in the county of Cuyahoga. and State of Ohio, have invented certain Improvements in Pulleys, Wheels, 8vo., of which the following is a specification. The object of this invention is toadmit O pulleys and wheels of various kinds being kept i in stock in such condition as will allow of their being .easily and readily adapted to fit shafting of different sizes.

In carrying out my invention pulleys'ofthe same diameter, or approximating to a common diameter, are cast .with a smooth, tapering central hole, Vinto which any oneof a number of iron bushes, differing in internal diameter, can :be forced, a bush having a hole nearest -iinsize to that required being selected for the purpose. The inserted bush is afterward bored to the proper size. To admit of the bush being driven firmly into the hub of the pulley or wheel, an'd secured therein without the aid of keys or set-screws, the said bush is made slightly compressible diametrically in\ the following manner: The bush is cored longitudinally, so as to consist of twoor more sections, united by junction-pieces having such limited cross-section` as to be elastic to the metal.

some extent, orsusceptible of compression, as force is applied to the exterior ofthe bush in the act of driving. It is lnot intended to subject the bush :to such strain as will crush or disintegrate the substance of the. junction@ pieces,l but only to compress them to a point of reduction within the range of elasticity of sections ofthe bush actually united bythe junction-pieces, the said pieces may be on one i While it is preferred to have the Figs. Ill to XII, inclusive, are views of bushes illustrating various methods of arranging the l sections thereof, as hereinafter fully described. Similar letters of reference indicate similar parts in all the views. r

A, B, and C represent, respectively, the rim, arms, and hub of the pulley. C is formed with a tapering central hole by means of a sand o1` metallic core.

D is the tapering bush, which is constructed with the same taper as the central hole in the hub, and of such diameter as will require 'some force to adjust it properly in the hub.

`The bush D is castslotted, or in sections, and furnished with the junction-pieces a, which separate the sections, as shown.

is bored, itis marked yto its place in the pul-` ley-hub, and the bushfthen removed, and the junction-pieces slightly reduced in thickness,

in order that the bush may properly clamp' the..

shaft. y

It is preferred to bore the bush somewhat smaller than the shaft, in which case the bush can be used without reducing the junctionpieces.

Bushes can be made with the j unction-piece`s of some material more easily compressed than iron-such as wood.

After the bush, when the same is in separate sections,

-lt will be understood that, instead of driving into the pulley a mandrel upon which to turn it, as is commonly practiced, the pulley may be secured to the mandrel by means ot' `my improved bushes, as before described.

I claim as my invention- 1. `In combination with a pulley or wheel, a tapering bush adapted for insertion in the hub, the said bush being in sections unitedby junction-pieces, substantially as specified.

2. A tapering bush for reducing the diameter ofthe central `hole in a pulley or gear wheel, formed in sections,united by junctionpieces, substantially as specified.

. i JOHN WALKER.

Vitnesses:` i

.THos. S. COOK,

GEO. W. GARDNER. 

